IT7869708A0 - RELAY PROTECTION DEVICE WITH THREE-PHASE RELEASE DUE TO UNDERVOLTAGE - Google Patents
RELAY PROTECTION DEVICE WITH THREE-PHASE RELEASE DUE TO UNDERVOLTAGEInfo
- Publication number
- IT7869708A0 IT7869708A0 IT7869708A IT6970878A IT7869708A0 IT 7869708 A0 IT7869708 A0 IT 7869708A0 IT 7869708 A IT7869708 A IT 7869708A IT 6970878 A IT6970878 A IT 6970878A IT 7869708 A0 IT7869708 A0 IT 7869708A0
- Authority
- IT
- Italy
- Prior art keywords
- undervoltage
- protection device
- relay protection
- release due
- phase release
- Prior art date
Links
- 238000004353 relayed correlation spectroscopy Methods 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/265—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured making use of travelling wave theory
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Emergency Protection Circuit Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7713409A SE409153B (en) | 1977-11-28 | 1977-11-28 | RELAY PROTECTION WITH THREE-PHASE RELEASE IN VOLTAGE |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7869708A0 true IT7869708A0 (en) | 1978-11-27 |
IT1160971B IT1160971B (en) | 1987-03-11 |
Family
ID=20333009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT69708/78A IT1160971B (en) | 1977-11-28 | 1978-11-27 | RELAY PROTECTION DEVICE WITH THREE-PHASE RELEASE FOLLOWING UNDER VOLTAGE |
Country Status (8)
Country | Link |
---|---|
US (1) | US4254444A (en) |
CA (1) | CA1117585A (en) |
CH (1) | CH641917A5 (en) |
DE (1) | DE2850412A1 (en) |
FR (1) | FR2410386A1 (en) |
GB (1) | GB2011740B (en) |
IT (1) | IT1160971B (en) |
SE (1) | SE409153B (en) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4825323A (en) * | 1987-11-12 | 1989-04-25 | General Electric Company | Out-of-step blocking unit |
US5838525A (en) * | 1997-04-15 | 1998-11-17 | Abb Power T&D Company, Inc. | High speed single-pole trip logic for use in protective relaying |
GB2388482B (en) * | 2002-05-07 | 2005-06-15 | Alstom | Improved power line protection |
MX2014003271A (en) | 2011-10-12 | 2014-04-10 | Schweitzer Engineering Lab Inc | Fault location using traveling waves. |
US8990036B1 (en) | 2013-09-16 | 2015-03-24 | Schweitzer Engineering Laboratories, Inc. | Power line parameter adjustment and fault location using traveling waves |
US9588168B2 (en) | 2013-09-16 | 2017-03-07 | Schweitzer Engineering Laboratories, Inc. | Fault location using traveling waves |
US9594112B2 (en) | 2014-09-16 | 2017-03-14 | Schweitzer Engineering Laboratories, Inc. | Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements |
US9509399B2 (en) | 2015-02-13 | 2016-11-29 | Schweitzer Engineering Laboratories, Inc. | Transmission line protection using traveling waves in optical ground wire fiber |
US10090664B2 (en) | 2015-09-18 | 2018-10-02 | Schweitzer Engineering Laboratories, Inc. | Time-domain directional line protection of electric power delivery systems |
CN110932246A (en) | 2015-09-18 | 2020-03-27 | 施瓦哲工程实验有限公司 | Time domain line protection for power transmission systems |
EP3363095A4 (en) | 2015-10-12 | 2019-08-14 | Schweitzer Engineering Laboratories, Inc. | Traveling wave directional element |
US10564247B2 (en) | 2015-10-13 | 2020-02-18 | Schweitzer Engineering Laboratories, Inc. | Testing system for traveling wave fault detectors |
CN108139438B (en) | 2015-10-13 | 2021-03-12 | 施瓦哲工程实验有限公司 | Power system monitoring using high frequency signals |
EP3363087A4 (en) | 2015-10-13 | 2019-06-26 | Schweitzer Engineering Laboratories, Inc. | Testing system for traveling wave fault detectors |
EP3362807A4 (en) | 2015-10-14 | 2019-06-26 | Schweitzer Engineering Laboratories, Inc. | High-frequency electric power system signal processing system |
CN109154630B (en) | 2016-06-13 | 2021-01-29 | 施瓦哲工程实验有限公司 | Overcurrent element in time domain |
EP3469674A1 (en) | 2016-06-14 | 2019-04-17 | Schweitzer Engineering Laboratories, Inc. | Phase selection for traveling wave fault detection systems |
US10236675B2 (en) | 2016-07-26 | 2019-03-19 | Schweitzer Engineering Laboratories, Inc. | Fault detection and protection during steady state using traveling waves |
US10585133B2 (en) | 2016-11-11 | 2020-03-10 | Schweitzer Engineering Laboratories, Inc. | Electric power fault protection device using single-ended traveling wave fault location estimation |
US10295585B2 (en) | 2016-11-11 | 2019-05-21 | Schweitzer Engineering Laboratories, Inc. | Traveling wave based single end fault location |
US11280834B2 (en) | 2018-08-30 | 2022-03-22 | Schweitzer Engineering Laboratories, Inc. | Detection of low-energy events in an electric power system |
US10677834B2 (en) | 2018-09-14 | 2020-06-09 | Schweitzer Engineering Laboratories, Inc. | Distance protection of electric power delivery systems using time domain and frequency domain |
US10641815B2 (en) | 2018-09-27 | 2020-05-05 | Schweitzer Engineering Laboratories, Inc. | Secure distance protection of electric power delivery systems under transient conditions |
US11067617B2 (en) | 2018-10-08 | 2021-07-20 | Schweitzer Engineering Laboratories, Inc. | Single-end traveling wave fault location using line-mounted device |
US11592498B2 (en) | 2020-10-02 | 2023-02-28 | Schweitzer Engineering Laboratories, Inc. | Multi-phase fault identification in capacitor banks |
US11735907B2 (en) | 2021-02-03 | 2023-08-22 | Schweitzer Engineering Laboratories, Inc. | Traveling wave overcurrent protection for electric power delivery systems |
US11808824B2 (en) | 2021-03-17 | 2023-11-07 | Schweitzer Engineering Laboratories, Inc. | Systems and methods to identify open phases of a capacitor bank |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB654913A (en) * | 1947-11-28 | 1951-07-04 | Westinghouse Electric Int Co | Improvements in or relating to protective relaying systems |
SE368092B (en) * | 1972-11-06 | 1974-06-17 | Asea Ab | |
SE373239B (en) * | 1973-05-21 | 1975-01-27 | Asea Ab | |
CH559449A5 (en) * | 1973-05-30 | 1975-02-28 | Bbc Brown Boveri & Cie | |
SE375886B (en) * | 1973-08-22 | 1975-04-28 | Asea Ab | |
DE2405908B1 (en) * | 1974-02-07 | 1975-06-05 | Siemens Ag | Control circuit for a main contactor |
SE387019B (en) * | 1974-11-21 | 1976-08-23 | Asea Ab | PROTECTION OF INSTALLATION INSTALLATIONS IN ELECTRIC POWER NETWORK |
GB1570491A (en) * | 1975-11-14 | 1980-07-02 | Gen Electric Co Ltd | Protective relay arrangements |
-
1977
- 1977-11-28 SE SE7713409A patent/SE409153B/en not_active IP Right Cessation
-
1978
- 1978-11-03 CH CH1134078A patent/CH641917A5/en not_active IP Right Cessation
- 1978-11-16 FR FR7832359A patent/FR2410386A1/en active Granted
- 1978-11-21 DE DE19782850412 patent/DE2850412A1/en not_active Withdrawn
- 1978-11-27 CA CA000316903A patent/CA1117585A/en not_active Expired
- 1978-11-27 GB GB7846161A patent/GB2011740B/en not_active Expired
- 1978-11-27 IT IT69708/78A patent/IT1160971B/en active
-
1979
- 1979-06-01 US US06/044,563 patent/US4254444A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2410386B1 (en) | 1983-12-02 |
CA1117585A (en) | 1982-02-02 |
CH641917A5 (en) | 1984-03-15 |
DE2850412A1 (en) | 1979-05-31 |
IT1160971B (en) | 1987-03-11 |
US4254444A (en) | 1981-03-03 |
FR2410386A1 (en) | 1979-06-22 |
SE409153B (en) | 1979-07-30 |
SE7713409L (en) | 1979-05-29 |
GB2011740A (en) | 1979-07-11 |
GB2011740B (en) | 1982-09-02 |
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